Before listening to this TED Talk, I didn't know that sleep can bring us so many benefits and harms, so I learned a lot. Even though late nights are unavoidable sometimes, at least for now I try to reduce the chances of it happening. Hope my body doesn't get screwed by me.

This title attracted me deeply. When I heard this question, I started counting. How many hours did I sleep?When I found that my sleep time hardly reached 8 hours, I was a little worried, but the lecturer told me not to be too nervous, 8 hours is just an average for our calculation, I thought that if my mom drove me to sleep in the future, can I say no to her?